drivers/media/dvb/bt8xx/dst_ca.c

   1 /*
   2         CA-driver for TwinHan DST Frontend/Card
   3
   4         Copyright (C) 2004, 2005 Manu Abraham (manu@kromtek.com)
   5
   6         This program is free software; you can redistribute it and/or modify
   7         it under the terms of the GNU General Public License as published by
   8         the Free Software Foundation; either version 2 of the License, or
   9         (at your option) any later version.
  10
  11         This program is distributed in the hope that it will be useful,
  12         but WITHOUT ANY WARRANTY; without even the implied warranty of
  13         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14         GNU General Public License for more details.
  15
  16         You should have received a copy of the GNU General Public License
  17         along with this program; if not, write to the Free Software
  18         Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include <linux/kernel.h>
  22 #include <linux/module.h>
  23 #include <linux/slab.h>
  24 #include <linux/init.h>
  25 #include <linux/mutex.h>
  26 #include <linux/string.h>
  27 #include <linux/dvb/ca.h>
  28 #include "dvbdev.h"
  29 #include "dvb_frontend.h"
  30 #include "dst_ca.h"
  31 #include "dst_common.h"
  32
  33 #define DST_CA_ERROR            0
  34 #define DST_CA_NOTICE           1
  35 #define DST_CA_INFO             2
  36 #define DST_CA_DEBUG            3
  37
  38 #define dprintk(x, y, z, format, arg...) do {                                           \
  39         if (z) {                                                                        \
  40                 if      ((x > DST_CA_ERROR) && (x > y))                                 \
  41                         printk(KERN_ERR "%s: " format "\n", __func__ , ##arg);  \
  42                 else if ((x > DST_CA_NOTICE) && (x > y))                                \
  43                         printk(KERN_NOTICE "%s: " format "\n", __func__ , ##arg);       \
  44                 else if ((x > DST_CA_INFO) && (x > y))                                  \
  45                         printk(KERN_INFO "%s: " format "\n", __func__ , ##arg); \
  46                 else if ((x > DST_CA_DEBUG) && (x > y))                                 \
  47                         printk(KERN_DEBUG "%s: " format "\n", __func__ , ##arg);        \
  48         } else {                                                                        \
  49                 if (x > y)                                                              \
  50                         printk(format, ## arg);                                         \
  51         }                                                                               \
  52 } while(0)
  53
  54
  55 static DEFINE_MUTEX(dst_ca_mutex);
  56 static unsigned int verbose = 5;
  57 module_param(verbose, int, 0644);
  58 MODULE_PARM_DESC(verbose, "verbose startup messages, default is 1 (yes)");
  59
  60 /*      Need some more work     */
  61 static int ca_set_slot_descr(void)
  62 {
  63         /*      We could make this more graceful ?      */
  64         return -EOPNOTSUPP;
  65 }
  66
  67 /*      Need some more work     */
  68 static int ca_set_pid(void)
  69 {
  70         /*      We could make this more graceful ?      */
  71         return -EOPNOTSUPP;
  72 }
  73
  74 static void put_command_and_length(u8 *data, int command, int length)
  75 {
  76         data[0] = (command >> 16) & 0xff;
  77         data[1] = (command >> 8) & 0xff;
  78         data[2] = command & 0xff;
  79         data[3] = length;
  80 }
  81
  82 static void put_checksum(u8 *check_string, int length)
  83 {
  84         dprintk(verbose, DST_CA_DEBUG, 1, " Computing string checksum.");
  85         dprintk(verbose, DST_CA_DEBUG, 1, "  -> string length : 0x%02x", length);
  86         check_string[length] = dst_check_sum (check_string, length);
  87         dprintk(verbose, DST_CA_DEBUG, 1, "  -> checksum      : 0x%02x", check_string[length]);
  88 }
  89
  90 static int dst_ci_command(struct dst_state* state, u8 * data, u8 *ca_string, u8 len, int read)
  91 {
  92         u8 reply;
  93
  94         mutex_lock(&state->dst_mutex);
  95         dst_comm_init(state);
  96         msleep(65);
  97
  98         if (write_dst(state, data, len)) {
  99                 dprintk(verbose, DST_CA_INFO, 1, " Write not successful, trying to recover");
 100                 dst_error_recovery(state);
 101                 goto error;
 102         }
 103         if ((dst_pio_disable(state)) < 0) {
 104                 dprintk(verbose, DST_CA_ERROR, 1, " DST PIO disable failed.");
 105                 goto error;
 106         }
 107         if (read_dst(state, &reply, GET_ACK) < 0) {
 108                 dprintk(verbose, DST_CA_INFO, 1, " Read not successful, trying to recover");
 109                 dst_error_recovery(state);
 110                 goto error;
 111         }
 112         if (read) {
 113                 if (! dst_wait_dst_ready(state, LONG_DELAY)) {
 114                         dprintk(verbose, DST_CA_NOTICE, 1, " 8820 not ready");
 115                         goto error;
 116                 }
 117                 if (read_dst(state, ca_string, 128) < 0) {      /*      Try to make this dynamic        */
 118                         dprintk(verbose, DST_CA_INFO, 1, " Read not successful, trying to recover");
 119                         dst_error_recovery(state);
 120                         goto error;
 121                 }
 122         }
 123         mutex_unlock(&state->dst_mutex);
 124         return 0;
 125
 126 error:
 127         mutex_unlock(&state->dst_mutex);
 128         return -EIO;
 129 }
 130
 131
 132 static int dst_put_ci(struct dst_state *state, u8 *data, int len, u8 *ca_string, int read)
 133 {
 134         u8 dst_ca_comm_err = 0;
 135
 136         while (dst_ca_comm_err < RETRIES) {
 137                 dprintk(verbose, DST_CA_NOTICE, 1, " Put Command");
 138                 if (dst_ci_command(state, data, ca_string, len, read)) {        // If error
 139                         dst_error_recovery(state);
 140                         dst_ca_comm_err++; // work required here.
 141                 } else {
 142                         break;
 143                 }
 144         }
 145
 146         if(dst_ca_comm_err == RETRIES)
 147                 return -1;
 148
 149         return 0;
 150 }
 151
 152
 153
 154 static int ca_get_app_info(struct dst_state *state)
 155 {
 156         int length, str_length;
 157         static u8 command[8] = {0x07, 0x40, 0x01, 0x00, 0x01, 0x00, 0x00, 0xff};
 158
 159         put_checksum(&command[0], command[0]);
 160         if ((dst_put_ci(state, command, sizeof(command), state->messages, GET_REPLY)) < 0) {
 161                 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
 162                 return -1;
 163         }
 164         dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");
 165         dprintk(verbose, DST_CA_INFO, 1, " ================================ CI Module Application Info ======================================");
 166         dprintk(verbose, DST_CA_INFO, 1, " Application Type=[%d], Application Vendor=[%d], Vendor Code=[%d]\n%s: Application info=[%s]",
 167                 state->messages[7], (state->messages[8] << 8) | state->messages[9],
 168                 (state->messages[10] << 8) | state->messages[11], __func__, (char *)(&state->messages[12]));
 169         dprintk(verbose, DST_CA_INFO, 1, " ==================================================================================================");
 170
 171         // Transform dst message to correct application_info message
 172         length = state->messages[5];
 173         str_length = length - 6;
 174         if (str_length < 0) {
 175                 str_length = 0;
 176                 dprintk(verbose, DST_CA_ERROR, 1, "Invalid string length returned in ca_get_app_info(). Recovering.");
 177         }
 178
 179         // First, the command and length fields
 180         put_command_and_length(&state->messages[0], CA_APP_INFO, length);
 181
 182         // Copy application_type, application_manufacturer and manufacturer_code
 183         memcpy(&state->messages[4], &state->messages[7], 5);
 184
 185         // Set string length and copy string
 186         state->messages[9] = str_length;
 187         memcpy(&state->messages[10], &state->messages[12], str_length);
 188
 189         return 0;
 190 }
 191
 192 static int ca_get_ca_info(struct dst_state *state)
 193 {
 194         int srcPtr, dstPtr, i, num_ids;
 195         static u8 slot_command[8] = {0x07, 0x40, 0x00, 0x00, 0x02, 0x00, 0x00, 0xff};
 196         const int in_system_id_pos = 8, out_system_id_pos = 4, in_num_ids_pos = 7;
 197
 198         put_checksum(&slot_command[0], slot_command[0]);
 199         if ((dst_put_ci(state, slot_command, sizeof (slot_command), state->messages, GET_REPLY)) < 0) {
 200                 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
 201                 return -1;
 202         }
 203         dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");
 204
 205         // Print raw data
 206         dprintk(verbose, DST_CA_INFO, 0, " DST data = [");
 207         for (i = 0; i < state->messages[0] + 1; i++) {
 208                 dprintk(verbose, DST_CA_INFO, 0, " 0x%02x", state->messages[i]);
 209         }
 210         dprintk(verbose, DST_CA_INFO, 0, "]\n");
 211
 212         // Set the command and length of the output
 213         num_ids = state->messages[in_num_ids_pos];
 214         if (num_ids >= 100) {
 215                 num_ids = 100;
 216                 dprintk(verbose, DST_CA_ERROR, 1, "Invalid number of ids (>100). Recovering.");
 217         }
 218         put_command_and_length(&state->messages[0], CA_INFO, num_ids * 2);
 219
 220         dprintk(verbose, DST_CA_INFO, 0, " CA_INFO = [");
 221         srcPtr = in_system_id_pos;
 222         dstPtr = out_system_id_pos;
 223         for(i = 0; i < num_ids; i++) {
 224                 dprintk(verbose, DST_CA_INFO, 0, " 0x%02x%02x", state->messages[srcPtr + 0], state->messages[srcPtr + 1]);
 225                 // Append to output
 226                 state->messages[dstPtr + 0] = state->messages[srcPtr + 0];
 227                 state->messages[dstPtr + 1] = state->messages[srcPtr + 1];
 228                 srcPtr += 2;
 229                 dstPtr += 2;
 230         }
 231         dprintk(verbose, DST_CA_INFO, 0, "]\n");
 232
 233         return 0;
 234 }
 235
 236 static int ca_get_slot_caps(struct dst_state *state, struct ca_caps *p_ca_caps, void __user *arg)
 237 {
 238         int i;
 239         u8 slot_cap[256];
 240         static u8 slot_command[8] = {0x07, 0x40, 0x02, 0x00, 0x02, 0x00, 0x00, 0xff};
 241
 242         put_checksum(&slot_command[0], slot_command[0]);
 243         if ((dst_put_ci(state, slot_command, sizeof (slot_command), slot_cap, GET_REPLY)) < 0) {
 244                 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
 245                 return -1;
 246         }
 247         dprintk(verbose, DST_CA_NOTICE, 1, " -->dst_put_ci SUCCESS !");
 248
 249         /*      Will implement the rest soon            */
 250
 251         dprintk(verbose, DST_CA_INFO, 1, " Slot cap = [%d]", slot_cap[7]);
 252         dprintk(verbose, DST_CA_INFO, 0, "===================================\n");
 253         for (i = 0; i < slot_cap[0] + 1; i++)
 254                 dprintk(verbose, DST_CA_INFO, 0, " %d", slot_cap[i]);
 255         dprintk(verbose, DST_CA_INFO, 0, "\n");
 256
 257         p_ca_caps->slot_num = 1;
 258         p_ca_caps->slot_type = 1;
 259         p_ca_caps->descr_num = slot_cap[7];
 260         p_ca_caps->descr_type = 1;
 261
 262         if (copy_to_user(arg, p_ca_caps, sizeof (struct ca_caps)))
 263                 return -EFAULT;
 264
 265         return 0;
 266 }
 267
 268 /*      Need some more work     */
 269 static int ca_get_slot_descr(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
 270 {
 271         return -EOPNOTSUPP;
 272 }
 273
 274
 275 static int ca_get_slot_info(struct dst_state *state, struct ca_slot_info *p_ca_slot_info, void __user *arg)
 276 {
 277         int i;
 278         static u8 slot_command[8] = {0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff};
 279
 280         u8 *slot_info = state->messages;
 281
 282         put_checksum(&slot_command[0], 7);
 283         if ((dst_put_ci(state, slot_command, sizeof (slot_command), slot_info, GET_REPLY)) < 0) {
 284                 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
 285                 return -1;
 286         }
 287         dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");
 288
 289         /*      Will implement the rest soon            */
 290
 291         dprintk(verbose, DST_CA_INFO, 1, " Slot info = [%d]", slot_info[3]);
 292         dprintk(verbose, DST_CA_INFO, 0, "===================================\n");
 293         for (i = 0; i < 8; i++)
 294                 dprintk(verbose, DST_CA_INFO, 0, " %d", slot_info[i]);
 295         dprintk(verbose, DST_CA_INFO, 0, "\n");
 296
 297         if (slot_info[4] & 0x80) {
 298                 p_ca_slot_info->flags = CA_CI_MODULE_PRESENT;
 299                 p_ca_slot_info->num = 1;
 300                 p_ca_slot_info->type = CA_CI;
 301         } else if (slot_info[4] & 0x40) {
 302                 p_ca_slot_info->flags = CA_CI_MODULE_READY;
 303                 p_ca_slot_info->num = 1;
 304                 p_ca_slot_info->type = CA_CI;
 305         } else
 306                 p_ca_slot_info->flags = 0;
 307
 308         if (copy_to_user(arg, p_ca_slot_info, sizeof (struct ca_slot_info)))
 309                 return -EFAULT;
 310
 311         return 0;
 312 }
 313
 314
 315 static int ca_get_message(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
 316 {
 317         u8 i = 0;
 318         u32 command = 0;
 319
 320         if (copy_from_user(p_ca_message, arg, sizeof (struct ca_msg)))
 321                 return -EFAULT;
 322
 323         if (p_ca_message->msg) {
 324                 dprintk(verbose, DST_CA_NOTICE, 1, " Message = [%02x %02x %02x]", p_ca_message->msg[0], p_ca_message->msg[1], p_ca_message->msg[2]);
 325
 326                 for (i = 0; i < 3; i++) {
 327                         command = command | p_ca_message->msg[i];
 328                         if (i < 2)
 329                                 command = command << 8;
 330                 }
 331                 dprintk(verbose, DST_CA_NOTICE, 1, " Command=[0x%x]", command);
 332
 333                 switch (command) {
 334                 case CA_APP_INFO:
 335                         memcpy(p_ca_message->msg, state->messages, 128);
 336                         if (copy_to_user(arg, p_ca_message, sizeof (struct ca_msg)) )
 337                                 return -EFAULT;
 338                         break;
 339                 case CA_INFO:
 340                         memcpy(p_ca_message->msg, state->messages, 128);
 341                         if (copy_to_user(arg, p_ca_message, sizeof (struct ca_msg)) )
 342                                 return -EFAULT;
 343                         break;
 344                 }
 345         }
 346
 347         return 0;
 348 }
 349
 350 static int handle_dst_tag(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u32 length)
 351 {
 352         if (state->dst_hw_cap & DST_TYPE_HAS_SESSION) {
 353                 hw_buffer->msg[2] = p_ca_message->msg[1];       /*      MSB     */
 354                 hw_buffer->msg[3] = p_ca_message->msg[2];       /*      LSB     */
 355         } else {
 356                 if (length > 247) {
 357                         dprintk(verbose, DST_CA_ERROR, 1, " Message too long ! *** Bailing Out *** !");
 358                         return -1;
 359                 }
 360                 hw_buffer->msg[0] = (length & 0xff) + 7;
 361                 hw_buffer->msg[1] = 0x40;
 362                 hw_buffer->msg[2] = 0x03;
 363                 hw_buffer->msg[3] = 0x00;
 364                 hw_buffer->msg[4] = 0x03;
 365                 hw_buffer->msg[5] = length & 0xff;
 366                 hw_buffer->msg[6] = 0x00;
 367
 368                 /*
 369                  *      Need to compute length for EN50221 section 8.3.2, for the time being
 370                  *      assuming 8.3.2 is not applicable
 371                  */
 372                 memcpy(&hw_buffer->msg[7], &p_ca_message->msg[4], length);
 373         }
 374
 375         return 0;
 376 }
 377
 378 static int write_to_8820(struct dst_state *state, struct ca_msg *hw_buffer, u8 length, u8 reply)
 379 {
 380         if ((dst_put_ci(state, hw_buffer->msg, length, hw_buffer->msg, reply)) < 0) {
 381                 dprintk(verbose, DST_CA_ERROR, 1, " DST-CI Command failed.");
 382                 dprintk(verbose, DST_CA_NOTICE, 1, " Resetting DST.");
 383                 rdc_reset_state(state);
 384                 return -1;
 385         }
 386         dprintk(verbose, DST_CA_NOTICE, 1, " DST-CI Command success.");
 387
 388         return 0;
 389 }
 390
 391 static u32 asn_1_decode(u8 *asn_1_array)
 392 {
 393         u8 length_field = 0, word_count = 0, count = 0;
 394         u32 length = 0;
 395
 396         length_field = asn_1_array[0];
 397         dprintk(verbose, DST_CA_DEBUG, 1, " Length field=[%02x]", length_field);
 398         if (length_field < 0x80) {
 399                 length = length_field & 0x7f;
 400                 dprintk(verbose, DST_CA_DEBUG, 1, " Length=[%02x]\n", length);
 401         } else {
 402                 word_count = length_field & 0x7f;
 403                 for (count = 0; count < word_count; count++) {
 404                         length = length  << 8;
 405                         length += asn_1_array[count + 1];
 406                         dprintk(verbose, DST_CA_DEBUG, 1, " Length=[%04x]", length);
 407                 }
 408         }
 409         return length;
 410 }
 411
 412 static int debug_string(u8 *msg, u32 length, u32 offset)
 413 {
 414         u32 i;
 415
 416         dprintk(verbose, DST_CA_DEBUG, 0, " String=[ ");
 417         for (i = offset; i < length; i++)
 418                 dprintk(verbose, DST_CA_DEBUG, 0, "%02x ", msg[i]);
 419         dprintk(verbose, DST_CA_DEBUG, 0, "]\n");
 420
 421         return 0;
 422 }
 423
 424
 425 static int ca_set_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u8 reply, u8 query)
 426 {
 427         u32 length = 0;
 428         u8 tag_length = 8;
 429
 430         length = asn_1_decode(&p_ca_message->msg[3]);
 431         dprintk(verbose, DST_CA_DEBUG, 1, " CA Message length=[%d]", length);
 432         debug_string(&p_ca_message->msg[4], length, 0); /*      length is excluding tag & length        */
 433
 434         memset(hw_buffer->msg, '\0', length);
 435         handle_dst_tag(state, p_ca_message, hw_buffer, length);
 436         put_checksum(hw_buffer->msg, hw_buffer->msg[0]);
 437
 438         debug_string(hw_buffer->msg, (length + tag_length), 0); /*      tags too        */
 439         write_to_8820(state, hw_buffer, (length + tag_length), reply);
 440
 441         return 0;
 442 }
 443
 444
 445 /*      Board supports CA PMT reply ?           */
 446 static int dst_check_ca_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer)
 447 {
 448         int ca_pmt_reply_test = 0;
 449
 450         /*      Do test board                   */
 451         /*      Not there yet but soon          */
 452
 453         /*      CA PMT Reply capable            */
 454         if (ca_pmt_reply_test) {
 455                 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 1, GET_REPLY)) < 0) {
 456                         dprintk(verbose, DST_CA_ERROR, 1, " ca_set_pmt.. failed !");
 457                         return -1;
 458                 }
 459
 460         /*      Process CA PMT Reply            */
 461         /*      will implement soon             */
 462                 dprintk(verbose, DST_CA_ERROR, 1, " Not there yet");
 463         }
 464         /*      CA PMT Reply not capable        */
 465         if (!ca_pmt_reply_test) {
 466                 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, NO_REPLY)) < 0) {
 467                         dprintk(verbose, DST_CA_ERROR, 1, " ca_set_pmt.. failed !");
 468                         return -1;
 469                 }
 470                 dprintk(verbose, DST_CA_NOTICE, 1, " ca_set_pmt.. success !");
 471         /*      put a dummy message             */
 472
 473         }
 474         return 0;
 475 }
 476
 477 static int ca_send_message(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
 478 {
 479         int i = 0;
 480         unsigned int ca_message_header_len;
 481
 482         u32 command = 0;
 483         struct ca_msg *hw_buffer;
 484         int result = 0;
 485
 486         if ((hw_buffer = kmalloc(sizeof (struct ca_msg), GFP_KERNEL)) == NULL) {
 487                 dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
 488                 return -ENOMEM;
 489         }
 490         dprintk(verbose, DST_CA_DEBUG, 1, " ");
 491
 492         if (copy_from_user(p_ca_message, arg, sizeof (struct ca_msg))) {
 493                 result = -EFAULT;
 494                 goto free_mem_and_exit;
 495         }
 496
 497
 498         if (p_ca_message->msg) {
 499                 ca_message_header_len = p_ca_message->length;   /*      Restore it back when you are done       */
 500                 /*      EN50221 tag     */
 501                 command = 0;
 502
 503                 for (i = 0; i < 3; i++) {
 504                         command = command | p_ca_message->msg[i];
 505                         if (i < 2)
 506                                 command = command << 8;
 507                 }
 508                 dprintk(verbose, DST_CA_DEBUG, 1, " Command=[0x%x]\n", command);
 509
 510                 switch (command) {
 511                 case CA_PMT:
 512                         dprintk(verbose, DST_CA_DEBUG, 1, "Command = SEND_CA_PMT");
 513                         if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, 0)) < 0) {   // code simplification started
 514                                 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT Failed !");
 515                                 result = -1;
 516                                 goto free_mem_and_exit;
 517                         }
 518                         dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT Success !");
 519                         break;
 520                 case CA_PMT_REPLY:
 521                         dprintk(verbose, DST_CA_INFO, 1, "Command = CA_PMT_REPLY");
 522                         /*      Have to handle the 2 basic types of cards here  */
 523                         if ((dst_check_ca_pmt(state, p_ca_message, hw_buffer)) < 0) {
 524                                 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT_REPLY Failed !");
 525                                 result = -1;
 526                                 goto free_mem_and_exit;
 527                         }
 528                         dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT_REPLY Success !");
 529                         break;
 530                 case CA_APP_INFO_ENQUIRY:               // only for debugging
 531                         dprintk(verbose, DST_CA_INFO, 1, " Getting Cam Application information");
 532
 533                         if ((ca_get_app_info(state)) < 0) {
 534                                 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_APP_INFO_ENQUIRY Failed !");
 535                                 result = -1;
 536                                 goto free_mem_and_exit;
 537                         }
 538                         dprintk(verbose, DST_CA_INFO, 1, " -->CA_APP_INFO_ENQUIRY Success !");
 539                         break;
 540                 case CA_INFO_ENQUIRY:
 541                         dprintk(verbose, DST_CA_INFO, 1, " Getting CA Information");
 542
 543                         if ((ca_get_ca_info(state)) < 0) {
 544                                 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_INFO_ENQUIRY Failed !");
 545                                 result = -1;
 546                                 goto free_mem_and_exit;
 547                         }
 548                         dprintk(verbose, DST_CA_INFO, 1, " -->CA_INFO_ENQUIRY Success !");
 549                         break;
 550                 }
 551         }
 552 free_mem_and_exit:
 553         kfree (hw_buffer);
 554
 555         return result;
 556 }
 557
 558 static long dst_ca_ioctl(struct file *file, unsigned int cmd, unsigned long ioctl_arg)
 559 {
 560         struct dvb_device *dvbdev;
 561         struct dst_state *state;
 562         struct ca_slot_info *p_ca_slot_info;
 563         struct ca_caps *p_ca_caps;
 564         struct ca_msg *p_ca_message;
 565         void __user *arg = (void __user *)ioctl_arg;
 566         int result = 0;
 567
 568         mutex_lock(&dst_ca_mutex);
 569         dvbdev = file->private_data;
 570         state = (struct dst_state *)dvbdev->priv;
 571         p_ca_message = kmalloc(sizeof (struct ca_msg), GFP_KERNEL);
 572         p_ca_slot_info = kmalloc(sizeof (struct ca_slot_info), GFP_KERNEL);
 573         p_ca_caps = kmalloc(sizeof (struct ca_caps), GFP_KERNEL);
 574         if (!p_ca_message || !p_ca_slot_info || !p_ca_caps) {
 575                 dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
 576                 result = -ENOMEM;
 577                 goto free_mem_and_exit;
 578         }
 579
 580         /*      We have now only the standard ioctl's, the driver is upposed to handle internals.       */
 581         switch (cmd) {
 582         case CA_SEND_MSG:
 583                 dprintk(verbose, DST_CA_INFO, 1, " Sending message");
 584                 if ((ca_send_message(state, p_ca_message, arg)) < 0) {
 585                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SEND_MSG Failed !");
 586                         result = -1;
 587                         goto free_mem_and_exit;
 588                 }
 589                 break;
 590         case CA_GET_MSG:
 591                 dprintk(verbose, DST_CA_INFO, 1, " Getting message");
 592                 if ((ca_get_message(state, p_ca_message, arg)) < 0) {
 593                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_MSG Failed !");
 594                         result = -1;
 595                         goto free_mem_and_exit;
 596                 }
 597                 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_MSG Success !");
 598                 break;
 599         case CA_RESET:
 600                 dprintk(verbose, DST_CA_ERROR, 1, " Resetting DST");
 601                 dst_error_bailout(state);
 602                 msleep(4000);
 603                 break;
 604         case CA_GET_SLOT_INFO:
 605                 dprintk(verbose, DST_CA_INFO, 1, " Getting Slot info");
 606                 if ((ca_get_slot_info(state, p_ca_slot_info, arg)) < 0) {
 607                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_SLOT_INFO Failed !");
 608                         result = -1;
 609                         goto free_mem_and_exit;
 610                 }
 611                 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_SLOT_INFO Success !");
 612                 break;
 613         case CA_GET_CAP:
 614                 dprintk(verbose, DST_CA_INFO, 1, " Getting Slot capabilities");
 615                 if ((ca_get_slot_caps(state, p_ca_caps, arg)) < 0) {
 616                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_CAP Failed !");
 617                         result = -1;
 618                         goto free_mem_and_exit;
 619                 }
 620                 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_CAP Success !");
 621                 break;
 622         case CA_GET_DESCR_INFO:
 623                 dprintk(verbose, DST_CA_INFO, 1, " Getting descrambler description");
 624                 if ((ca_get_slot_descr(state, p_ca_message, arg)) < 0) {
 625                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_DESCR_INFO Failed !");
 626                         result = -1;
 627                         goto free_mem_and_exit;
 628                 }
 629                 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_DESCR_INFO Success !");
 630                 break;
 631         case CA_SET_DESCR:
 632                 dprintk(verbose, DST_CA_INFO, 1, " Setting descrambler");
 633                 if ((ca_set_slot_descr()) < 0) {
 634                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SET_DESCR Failed !");
 635                         result = -1;
 636                         goto free_mem_and_exit;
 637                 }
 638                 dprintk(verbose, DST_CA_INFO, 1, " -->CA_SET_DESCR Success !");
 639                 break;
 640         case CA_SET_PID:
 641                 dprintk(verbose, DST_CA_INFO, 1, " Setting PID");
 642                 if ((ca_set_pid()) < 0) {
 643                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SET_PID Failed !");
 644                         result = -1;
 645                         goto free_mem_and_exit;
 646                 }
 647                 dprintk(verbose, DST_CA_INFO, 1, " -->CA_SET_PID Success !");
 648         default:
 649                 result = -EOPNOTSUPP;
 650         };
 651  free_mem_and_exit:
 652         kfree (p_ca_message);
 653         kfree (p_ca_slot_info);
 654         kfree (p_ca_caps);
 655
 656         mutex_unlock(&dst_ca_mutex);
 657         return result;
 658 }
 659
 660 static int dst_ca_open(struct inode *inode, struct file *file)
 661 {
 662         dprintk(verbose, DST_CA_DEBUG, 1, " Device opened [%p] ", file);
 663         try_module_get(THIS_MODULE);
 664
 665         return 0;
 666 }
 667
 668 static int dst_ca_release(struct inode *inode, struct file *file)
 669 {
 670         dprintk(verbose, DST_CA_DEBUG, 1, " Device closed.");
 671         module_put(THIS_MODULE);
 672
 673         return 0;
 674 }
 675
 676 static ssize_t dst_ca_read(struct file *file, char __user *buffer, size_t length, loff_t *offset)
 677 {
 678         ssize_t bytes_read = 0;
 679
 680         dprintk(verbose, DST_CA_DEBUG, 1, " Device read.");
 681
 682         return bytes_read;
 683 }
 684
 685 static ssize_t dst_ca_write(struct file *file, const char __user *buffer, size_t length, loff_t *offset)
 686 {
 687         dprintk(verbose, DST_CA_DEBUG, 1, " Device write.");
 688
 689         return 0;
 690 }
 691
 692 static const struct file_operations dst_ca_fops = {
 693         .owner = THIS_MODULE,
 694         .unlocked_ioctl = dst_ca_ioctl,
 695         .open = dst_ca_open,
 696         .release = dst_ca_release,
 697         .read = dst_ca_read,
 698         .write = dst_ca_write,
 699         .llseek = noop_llseek,
 700 };
 701
 702 static struct dvb_device dvbdev_ca = {
 703         .priv = NULL,
 704         .users = 1,
 705         .readers = 1,
 706         .writers = 1,
 707         .fops = &dst_ca_fops
 708 };
 709
 710 struct dvb_device *dst_ca_attach(struct dst_state *dst, struct dvb_adapter *dvb_adapter)
 711 {
 712         struct dvb_device *dvbdev;
 713
 714         dprintk(verbose, DST_CA_ERROR, 1, "registering DST-CA device");
 715         if (dvb_register_device(dvb_adapter, &dvbdev, &dvbdev_ca, dst, DVB_DEVICE_CA) == 0) {
 716                 dst->dst_ca = dvbdev;
 717                 return dst->dst_ca;
 718         }
 719
 720         return NULL;
 721 }
 722
 723 EXPORT_SYMBOL(dst_ca_attach);
 724
 725 MODULE_DESCRIPTION("DST DVB-S/T/C Combo CA driver");
 726 MODULE_AUTHOR("Manu Abraham");
 727 MODULE_LICENSE("GPL");